SPB433J1
A bold presence in the dark, the SEIKO PROSPEX SPB433J1 Black Series ‘Night Vision’ Sumo Diver Limited Edition is built for professional diving performance and urban adventure alike. Featuring a 45mm stainless steel case with super-hard coating and a striking black ceramic unidirectional rotating bezel, this timepiece ensures both resilience and a sleek matte finish. The deep black dial is paired with vivid LumiBrite markers, inspired by night vision optics, for exceptional readability in low light.
Driven by Seiko’s reliable 6R35 automatic movement, it offers a generous 72-hour power reserve and daily accuracy of -15/+25 seconds. With a 200m water resistance rating, screw-down crown, and robust stainless steel bracelet, this limited edition watch delivers outstanding performance and rugged elegance—each piece individually numbered on the case back.
Movement
Calibre: 6R35
Movement Type: Automatic with manual winding
Accuracy: -15/+25 seconds per day
Power Reserve: Approx. 72 hours
Jewels: 24
Functions
Date display
Stop seconds hand function
Dial & Hands
Dial Colour: Black
LumiBrite: On hands and indexes
Case
Case Material: Stainless steel with super-hard coating, ceramic bezel
Case Diameter: 45.0mm
Case Thickness: 13.4mm
Case Length (Lug-to-lug): 52.6mm
Crystal Type: Sapphire crystal
Crystal Coating: Anti-reflective coating on inner surface
Bezel: Unidirectional rotating bezel
Crown: Screw-down crown
Case Back: Screw case back with LIMITED EDITION and serial number engraving
Strap/Bracelet
Strap/Bracelet: Stainless steel
Clasp: Three-fold clasp with secure lock and push-button release
Durability
Water Resistance: 20 bar (200 metres)